ISSN 2326-7275
International Journal of Anatomy and Physiology | Vol. 15, No. 11, November 2026 | pp. 1–5
DOI: 10.46882/2026/IJAP/001032
Full Length Research Paper
Title: The Impact of Varied Sitting Postures on Pulmonary Function Volumes and Capacities in Academic Students
Names of Authors: Baghery Hojat¹, Esmaeilzadeh Mahdi¹*
Authors’ Affiliations:
¹ Department of Basic Sciences, Shirvan Branch, Islamic Azad University, Shirvan, Iran.
Abstract:
The purpose of this study was to investigate changes that occur in pulmonary function when postural changes in the sagittal plane are made in a seated position in students. This cross-sectional analytical study was done randomly on 20 boys from Iran, and the results of a forced expiratory maneuver in these young healthy subjects were compared according to body posture. Twenty able-bodied student boys (age 13.5 ± 1.09 yr, height 158.25 ± 5.65 cm, and weight 50.45 ± 7.02 kg) participated in this study. Standard spirometric measurements including forced vital capacity (FVC), forced expiratory volume in 1 s (FEV1), and peak expiratory flow (PEF) were taken for each subject in each of 3 sitting postures (normal, slumped, and kyphotic) and a standing posture. A repeated-measures ANOVA and a paired t-test indicated that FVC and FEV1 values in the standing posture were significantly higher than in the sitting postures. In slumped sitting, FVC, FEV1, and PEF significantly decreased compared to the other sitting postures. However, there was no significant difference for FVC, PEF, and FEV1 between the normal and kyphotic sitting postures. The results showed that FVC, FEV1, and PEF, as important indices in the health of pulmonary system function, were affected by sitting posture, particularly the slumped sitting posture. Consequently, students should prevent slumped sitting postures.
Keywords: Pulmonary function, sitting, forced vital capacity, forced expiratory volume in 1 s, peak expiratory flow.
Manuscript Timeline: Received: April 12, 2026; Revised: May 20, 2026; Accepted: June 08, 2026; Published: November 01, 2026.
Citation: Hojat B, Mahdi E. The Impact of Varied Sitting Postures on Pulmonary Function Volumes and Capacities in Academic Students. International Journal of Anatomy and Physiology. 2026; 15(11): 1–5. doi:10.46882/2026/IJAP/001032